parts: All on one plate, or just the body, cap or plug. Print the pieces one at a time if you want to use different colors, or all at once for convenience.

Ears: enable.disable 'ears' on the ends of the pen to reduce warping

Support: enable or disable support under the tip to reduce warping

Print one, at least 20% infil - 100% infil doesn't use much plastic, and the pen is stronger. Make sure you have your filament diameter calibrated - the fit of the cap and plug to the body is precise. Peel off the 'ears' at the ends of the pen. and carve off the support under the tip of the pen (see detail rendering). Insert a Pilot G2 ink cartridge into the pen. Insert the plug to hold the ink cartridge, and turn it to lock it into place.

I've printed dozens of these over the last year. It's great that the Customizer Competition gave me the "push" to get it re-uploaded from the ancient version that I had here. And it's very cool that the Customizer makes it easy for people to custom generate pens.